Initial commit.

1 files changed, 46 insertions, 0 deletions

diff --git a/main.go b/main.go
new file mode 100644
index 0000000..5ce452d
--- /dev/null
+++ b/main.go
@@ -0,0 +1,46 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"io"
+	"net"
+	"os"
+)
+
+func main() {
+
+	localAddr := flag.String("l", "192.168.122.110:3306", "local address we listen on")
+	remoteAddr := flag.String("r", "127.0.0.1:3306", "remote address we proxy to")
+	verbose := flag.Bool("v", false, "log connection")
+
+	flag.Parse()
+
+	local, err := net.Listen("tcp", *localAddr)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "listening failed: %s \n", err.Error())
+		os.Exit(-1)
+	}
+	for {
+		conn, err := local.Accept()
+		if err != nil {
+			fmt.Fprintf(os.Stderr, "accepting failed: %s", err.Error())
+			os.Exit(-1)
+		}
+		go forward(conn, *remoteAddr, *verbose)
+	}
+}
+
+func forward(local net.Conn, remoteAddr string, verbose bool) {
+	remote, err := net.Dial("tcp", remoteAddr)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "remote dial failed: %s\n", err.Error())
+		return
+	}
+	go io.Copy(local, remote)
+	go io.Copy(remote, local)
+
+	if verbose {
+		fmt.Println("message from: " + remoteAddr)
+	}
+}